I hate that Paranoid Android map TvP on SCII. Every Protoss I've encountered have gone the 3 Void Ray build, and even though I scout it, stop it, I fall too far behind. Eventually, Protoss masses Carriers+Mothership, and there is no feasible counter to that. I guess it holds true that the Carriers are unstoppable once you reach a certain limit.
Also, I'm trying to make Thor-first builds in TvZ and TvP, though I know I get countered by 2 Hatch Roaches, Immortals, or Void Ray/Carrier/Mothership. I catch people off guard with my builds, but I think I should add Barracks builds in both matchups.